AgentScan
AgentScan is a free, deterministic security scanner for AI agent skills. It checks a skill directory (Claude Code, Codex, OpenCode, MCP servers) for prompt injection, secrets, network calls, malware patterns, and obfuscation before you install it. Every finding has file:line evidence and a confidence score. It never runs the skill, never uploads anything, and works offline. Free and open source (MIT); Trust Pack adds 90 pre-audited skills via one command.
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Claude Marketplace
Claude Marketplace is a platform within the Claude AI ecosystem that allows developers and organizations to discover, install, and share extensions that expand the capabilities of Claude-powered applications and agents. The marketplace functions as a centralized catalog of plugins, tools, and “skills” that enhance what Claude can do beyond its base AI capabilities. These extensions can add specialized functions such as external data access, browser automation, integrations with third-party APIs, or domain-specific workflows for areas like DevOps, research, analytics, and application development. By installing these extensions, users can transform Claude from a general conversational AI into a customizable platform capable of executing complex tasks and interacting with other systems. The marketplace enables developers to build and distribute plugins that integrate directly into Claude’s runtime environment.
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blume
Blume is a desktop sidecar for AI coding agents that helps developers see what every agent is doing, keep project context consistent, and catch drift before it reaches the codebase. It works with tools including Cursor, Claude Code, Codex, omp, and Pi, bringing agent activity, hidden files, skills, hooks, rules, and provider usage into one place. The Agents view shows whether each coding agent is working, finished, or waiting for approval, while Setup exposes the instructions and configuration files shaping agent behavior. Usage tracking shows remaining plan limits and token burn across providers such as Claude, Codex, and Cursor so developers can avoid unexpected interruptions. Blume stores conversation history locally on the device and reviews rules, skills, and hooks on-device. Its Improve workflow looks for repeated signals of friction across conversations, clusters similar issues, and proposes concrete changes such as new rules or reusable skills.
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Skillfully
Skillfully is a publishing platform for experts, authors, coaches, and consultants who want to turn a proven method into a practical AI agent skill. A skill packages an author's method as instructions ChatGPT or Claude can follow to help readers work through relevant tasks. Skillfully works with authors to develop skills from books and existing materials, then publishes paid access for readers. Authors apply to publish, so the service is curated rather than an open marketplace. Readers subscribe and install a skill in ChatGPT or Claude, where it guides the AI through the author's process. Authors can review how readers use the method, identify where they get stuck, and revise skills so subscribers receive updates. Skillfully shares subscription revenue with authors at different rates depending on who brings each subscriber. It serves experts with a developed method and readers seeking structured help applying it.
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